72=2x+6x

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Solution for 72=2x+6x equation: 



72=2x+6x

We move all terms to the left:

72-(2x+6x)=0

We add all the numbers together, and all the variables

-(+8x)+72=0

We get rid of parentheses

-8x+72=0

We move all terms containing x to the left, all other terms to the right

-8x=-72

x=-72/-8

x=+9

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